生物炭
钴
催化作用
碳纤维
甲醇
浸出(土壤学)
电池(电)
微生物燃料电池
化学
核化学
无机化学
材料科学
热解
电极
有机化学
物理化学
功率(物理)
复合材料
物理
环境科学
复合数
阳极
土壤科学
量子力学
土壤水分
作者
Wenjing Miao,Weifeng Liu,Yongchang Ding,Renhua Guo,Jiao Zhao,Ye Zhu,Huan Yu,Yimin Zhu
标识
DOI:10.1016/j.jece.2022.108474
摘要
To improve the oxygen reduction reaction (ORR) kinetics in microbial fuel cell (MFC) and Zn-air battery, cobalt (iron), nitrogen and carbon doped mushroom biochar, i.e. [email protected], [email protected] and [email protected] were prepared using metal-organic frameworks and mushroom as the precursors. The catalysts showed a mesopore-dominant structure with abundant Metal-N, Pyridinic-N and Graphitic-N catalytic active sites. Rotating disk electrode tests revealed that [email protected] performed the best ORR activity in neutral and alkaline solutions, which followed the four-electron transfer ORR pathway. Acid leaching could further improve the ORR activity of [email protected] in neutral conditions. In MFCs, the [email protected] and acid-leached [email protected] yielded maximum power densities of 1052.5 mW m−2 and 1126.3 mW m−2 respectively. The above catalysts also produced high power densities of 94.0 mW cm−2 and 93.7 mW cm−2 in the Zn-air battery, with high stability and good methanol tolerance. This article provides a new strategy to prepare low-cost and efficient non-noble ORR catalysts for microbial fuel cell and Zn-air battery.
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